Struct bitvec::index::BitEnd

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pub struct BitEnd<R = usize>
where R: BitRegister,
{ /* private fields */ }
Expand description

§One-Bit-After Tail Index

This is a semantic bit-index within or one bit after an R register. It is the index of the first “dead” bit after a “live” region, and corresponds to the similar half-open range concept in the Rust Range type or the LLVM memory model, pointer values include the address one object past the end of a region.

It is a counter in the ring 0 ..= R::BITS (note the inclusive high end). Like BitIdx, this is a virtual semantic index with no bearing on real memory effects; unlike BitIdx, it can never be translated to real memory because it does not describe real memory.

This type is necessary in order to preserve the distinction between a dead memory address that is not part of a region and a live memory address that is within a region. Additionally, it makes computation of region extension or offsets easy. BitIdx is insufficient to this task, and produces off-by-one errors when used in its stead.

§Type Parameters

  • R: The register element that this dead-bit index governs.

§Validity

Values of this type are required to be in the range 0 ..= R::BITS. Any value greater than R::BITS makes the program invalid and will likely cause either a crash or incorrect memory access.

§Construction

This type cannot be publicly constructed except by using the iterators provided for testing.

Implementations§

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impl<R> BitEnd<R>
where R: BitRegister,

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pub const MAX: Self = _

The inclusive maximum tail within (or after) an R element.

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pub const MIN: Self = _

The inclusive minimum tail within (or after) an R element.

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pub fn new(end: u8) -> Option<Self>

Wraps a counter value as a known-good tail of an R register.

§Parameters
  • end: The counter value to mark as a tail. This must be in the range 0 ..= R::BITS.
§Returns

This returns Some(end) when it is in the valid range 0 ..= R::BITS, and None when it is not.

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pub fn into_inner(self) -> u8

Removes the tail wrapper, leaving the internal counter.

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pub fn range_from( from: BitIdx<R>, ) -> impl Iterator<Item = Self> + DoubleEndedIterator + ExactSizeIterator + FusedIterator

Iterates over all tail indices at and after an inclusive starting point.

Because implementation details of the range type family, including the RangeBounds trait, are not yet stable, and heterogeneous ranges are not yet supported, this must be an opaque iterator rather than a direct Range<BitEnd<R>>.

§Parameters
  • from: The inclusive low bound of the range. This will be the first tail produced by the iterator.
§Returns

An opaque iterator that is equivalent to the range from ..= Self::MAX.

Trait Implementations§

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impl<R> Binary for BitEnd<R>
where R: BitRegister,

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fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<R> Clone for BitEnd<R>
where R: BitRegister + Clone,

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fn clone(&self) -> BitEnd<R>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<R> Debug for BitEnd<R>
where R: BitRegister,

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fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<R> Default for BitEnd<R>
where R: BitRegister + Default,

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fn default() -> BitEnd<R>

Returns the “default value” for a type. Read more
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impl<R> Display for BitEnd<R>
where R: BitRegister,

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fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<R> Hash for BitEnd<R>
where R: BitRegister + Hash,

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<R> Ord for BitEnd<R>
where R: BitRegister + Ord,

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fn cmp(&self, other: &BitEnd<R>) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl<R> PartialEq for BitEnd<R>

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fn eq(&self, other: &BitEnd<R>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<R> PartialOrd for BitEnd<R>

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fn partial_cmp(&self, other: &BitEnd<R>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<R> Copy for BitEnd<R>
where R: BitRegister + Copy,

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impl<R> Eq for BitEnd<R>
where R: BitRegister + Eq,

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impl<R> StructuralPartialEq for BitEnd<R>
where R: BitRegister,

Auto Trait Implementations§

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impl<R> Freeze for BitEnd<R>

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impl<R> RefUnwindSafe for BitEnd<R>
where R: RefUnwindSafe,

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impl<R> Send for BitEnd<R>

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impl<R> Sync for BitEnd<R>

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impl<R> Unpin for BitEnd<R>

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impl<R> UnwindSafe for BitEnd<R>
where R: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pipe for T
where T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R
where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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fn pipe_borrow_mut<'a, B, R>( &'a mut self, func: impl FnOnce(&'a mut B) -> R, ) -> R
where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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fn tap(self, func: impl FnOnce(&Self)) -> Self

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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

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where Self: Deref<Target = T>, T: ?Sized,

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where Self: Borrow<B>, B: ?Sized,

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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

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where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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